Latin America experienced an unprecedented wave of left-leaning governments between 1998 and 2010. This volume examines the causes of this leftward turn and the consequences it carries for the region in the twenty-first century. The Resurgence of the Latin American Left asks three central questions: Why have left-wing parties and candidates flourished in Latin America? How have these leftist parties governed, particularly in terms of social and economic policy? What effects has the rise of the Left had on democracy and development in the region? The book addresses these questions through two sections. The first looks at several major themes regarding the contemporary Latin American Left, including whether Latin American public opinion actually shifted leftward in the 2000s, why the Left won in some countries but not in others, and how the left turn has affected market economies, social welfare, popular participation in politics, and citizenship rights. The second section examines social and economic policy and regime trajectories in eight cases: those of leftist governments in Argentina, Bolivia, Brazil, Chile, Ecuador, Uruguay, and Venezuela, as well as that of a historically populist party that governed on the right in Peru. Featuring a new typology of Left parties in Latin America, an original framework for identifying and categorizing variation among these governments, and contributions from prominent and influential scholars of Latin American politics, this historical-institutional approach to understanding the region's left turn -- and variation within it -- is the most comprehensive explanation to date on the topic.